POST UTME RSU 2017 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A particle of mass 1 kg is moving in a circular path of radius 2 m with a cons\tant speed of 4 m/s. What is the magnitude of the force acting on the particle, directed towards the center of the circle?
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 2
A convex lens of focal length 20 cm is used to form an image of an object placed 30 cm from the lens. If the object is moved to a dis\tance of 40 cm from the lens, what is the new position of the image?
A. 10 cm from the lens
B. 20 cm from the lens
C. 30 cm from the lens
D. 40 cm from the lens
Question 3
A particle of mass 1 kg is moving in a circular path of radius 1 m with a cons\tant speed of 2 m/s. If the particle is subjected to a centripetal force of 4 N, what is the angular velocity of the particle?
A. \( 1.0 , \text{rad/s} \)
B. \( 2.0 , \text{rad/s} \)
C. \( 3.0 , \text{rad/s} \)
D. \( 4.0 , \text{rad/s} \)
Question 4
A wave of frequency 100 Hz and wavelength 0.1 m is traveling through a medium. What is the speed of the wave?
A. 10 m/s
B. 20 m/s
C. 30 m/s
D. 40 m/s
Question 5
A beam of light is incident on a prism at an angle of 30°. If the re\fractive index of the prism is 1.5, calculate the angle of re\fraction.
A. 20°
B. 30°
C. 40°
D. 50°
Question 6
A light ray passes from air into a glass block with a re\fractive index of 1.8. If the angle of incidence is 40°, what is the angle of re\fraction?
A. 25°
B. 30°
C. 35°
D. 40°
Question 7
A 1000 Hz AC voltage source is connected to a 50 Ω resistor. If the maximum voltage is 100 V, what is the root mean square (RMS) value of the current in the circuit?
A. 0.707 A
B. 1.414 A
C. 2.828 A
D. 5.657 A
Question 8
A 5 μF capacitor is connected in series with a 10 kΩ resistor. What is the time cons\tant of the circuit?
A. 50 ms
B. 100 ms
C. 200 ms
D. 500 ms
Question 9
A particle of mass 2 kg is attached to a spring with a spring cons\tant of 200 N/m. If the particle is displaced by 3 m from its equilibrium position and released, what is the frequency of the oscillations?
A. 1 Hz
B. 2 Hz
C. 3 Hz
D. 4 Hz
Question 10
A beam of light is incident on a plane mirror at an angle of 60°. What is the angle of reflection?
A. 30°
B. 40°
C. 50°
D. 60°
Question 11
A particle of mass 2 kg is moving in a circular path of radius 3 m with a cons\tant speed of 4 m/s. If the particle is subject to a centripetal force of 12 N, what is the magnitude of the acceleration of the particle?
A. 16 m/s^2
B. 12 m/s^2
C. 8 m/s^2
D. 24 m/s^2
Question 12
A solid sphere of radius 0.05 m and mass 0.5 kg is susp\ended from a wire of length 0.5 m in a uniform gravitational field. If the sphere is displaced by 0.01 m from its equilibrium position, calculate the restoring torque acting on the sphere.
A. 0.0015 Nm
B. 0.0020 Nm
C. 0.0025 Nm
D. 0.0030 Nm
Question 13
A 2 kg block is attached to a horizontal spring with a spring cons\tant of 100 N/m. If the block is displaced by 0.1 m from its equilibrium position and released from rest, what is the maximum speed of the block?
A. 0.1 m/s
B. 1 m/s
C. 10 m/s
D. 100 m/s
Question 14
A car is traveling at a cons\tant speed of 50 km/h. If the driver applies the brakes and the car comes to a stop in 5 seconds, what is the magnitude of the acceleration of the car?
A. 10 m/s^2
B. 20 m/s^2
C. 30 m/s^2
D. 40 m/s^2
Question 15
A particle of mass 0.1 kg and charge 2 C is moving in a circular path of radius 0.1 m with a speed of 10 m/s. If the particle is placed in a uniform magnetic field of strength 0.5 T, calculate the force acting on the particle.
A. 0.1 N
B. 0.2 N
C. 0.3 N
D. 0.4 N

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